Home / 1,441.20-2,161.86-790.63

Finding the Fourth Proportional to 1,441.20, 2,161.86 and 790.63

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Solution

The fourth proportional to 1,441.20, 2,161.86 and 790.63 is: 1,185.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,441.20 : 2,161.86 = 790.63 : x
  2. Step 2: Convert to fraction form
    1,441.20/2,161.86 = 790.63/x
  3. Step 3: Cross multiply
    1,441.20x = 2,161.86 × 790.63
  4. Step 4: Simplify right side
    1,441.20x = 1,709,231.37
  5. Step 5: Solve for x
    x = 1,709,231.37/1,441.20
  6. Step 6: Final answer
    x = 1,185.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.